Abstract: Based on the bend/twist coupling characteristics of composite materials, the design and process technology of unbalanced composite material laminating have been studied to achieve the design requirements of wingtip twist angle increment and improve the aero-elastic characteristics of aircraft. An engineering solution was developed to design the twist coupling characteristics for composite wing structure, and contrast experiments have been carried out. The test results show that the effectiveness of wash-out of the wing box is considerable after tailoring design and the twist angle increment of wingtip decreases by 10%-45% under different loadings.